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Quiz01 - (b If you have 4 marbles two black and two white...

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MATH/STAT 418 Probability Spring 2008 Quiz 01 06/17/2008 Directions: This quiz is 15 minutes, closed book and closed notes. You are allowed to use a calculator. The entire quiz is worth 10 points. You must show all work (i.e. explaining your reasoning in details) in order to receive full credit. Name: 1. ( 4 points) If you have several marbles with different colors, and you need to put them in a line. How many orders are possible, if (a) you have 3 marbles, 1 red, 1 green and 1 blue?
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Unformatted text preview: (b) If you have 4 marbles, two black and two white? 2. (6 points) Consider the grid of points shown below. Suppose that the starting point is labeled A you can go one step up or one step to the right at each move. This is continued until the point labeled B is reached. (a) How many different paths from A to C are possible? (b) If you have to pass two points, labeled C and D, how many different paths from A to B are possible? (c) How many different paths from A to B are possible?...
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